1️⃣ Learn how glue works
2️⃣ Create effective art meshes for the mouth parts
3️⃣ Glue the mouth parts together
🚩 Quest 1: Learn how glue works
🚩 Quest 2: Create mouth art meshes
🚩 Quest 3: Glue the mouth parts together
Glue allows you to connect two different art meshes so that movement from one mesh influences the other.
Imagine two boxes — when you glue the edge points of Box A and Box B, moving Box A will also affect Box B.
Glue binds matching points between two meshes. To do this:
Your selected points will highlight, and when you exit the manual editor, you’ll see a yellow glue box between them.
Let's see this in action:
If we are to look at each boxes art mesh, you can see that I've created points along the art mesh that align.
Box A Art Mesh:
Box B Art Mesh:
It's these points across the middle line of these boxes that we can bind together.
To glue these two art meshes together, we must first select both art meshes and head into the "Manual Mesh Editing" Window.
Here we can use the pointer tool or lasso tool to select the matching points of the art meshes.
With our points selected, we can click the "Glue: Bind" button in our Tool Details window.
Once clicked, your selected points should now have a highlight around them.
This confirms that you have glued these two pieces together.
You can now exit the Manual Mesh Editing window.
Upon exiting, you will now see the points highlighted and this yellow box:
When you click the box, this window will appear:
This is your glue window / tool!
This window / tool allows you to adjust the weight of your glue.
Or in other words, which art mesh has control over what area.
The Colours indicate which art mesh has the control.
Box A (Art Mesh A) is red.
Box B (Art Mesh B) is green.
Yellow, indicates both art meshes influence.
Right now, we can see that the left side of Box A is red, the right side of Box B is green, and the middle is yellow.
This means that Box A controls the left side (Maintaining it's shape), Box B controls the right side (Maintaining it's shape), and the middle points are influenced by both art mesh positions.
If we click and drag Box A around, lets see what happens.
As we can see here, the red and green areas of each art mesh are remaining the "same", while the yellow area or the middle, is trying to stay in the middle positions of both art meshes.
We can change the weight of the glue by using our glue tools.
Let's talk about the tools from left to right.
Our first tool "Glue Weight A : B" allows you to adjust how much our first art mesh (Box A) will affect our second art mesh (Box B)
Our second tool "Glue Weight A", allows us to adjust the red art meshes influence.
Our third tool "Glue Weight B", allows us to adjust the green art meshes influence.
Our last tool "Re-Merge Glue Vertices Tool", will even out the influence of both art meshes on an area.
Let's see what the use of these tools look like:
"Glue Weight A : B"
Again, this tool will allow us to adjust how much our first mesh will affect our second mesh.
In this case, you can see I add the full red weight to Box A and Box B with this tool. It makes it so that the red area has control over all of Box A, and a portion of Box B.
Box A will have it's area remain the same while moving, while Box B is severely influenced by the movement of Box A.
"Glue Weight A" & "Glue Weight B"
This tool will allow us to only change the influence of the one art mesh, not both. So here we can see with a full weight put on Box A, it makes Box A's area remain the same or untouched, but Box B will still have a yellow/green weight, making it still influenced by Box A, but not as much.
In this example, I use "Glue Weight A" to change the weight of the red art mesh (Box A).
"Re-Merge Glue Vertices Tool"
This tool just adds back even weighting of glue!
Now let's apply what we've learned to the mouth!
First we must familiarize ourselves with the different pieces of the mouth!
Most standard VTuber Mouths will have a Mouth Line and Mouth Skin. Some cases, like this model, will have shading for lipstick or highlights!
As we saw from the glue quest, we can make an art mesh have full influence over another art mesh. (Box A had full influence to drag Box B around).
This means that we could glue everything on the top of the mouth together, and only have to rig one art mesh.
So instead of rigging all 6 parts here, we'll only have to rig two!
We need to figure out which part is our "Box A".
What part would need to move or be adjusted the most, and what parts could follow along?
Mouth Lines!
So our Top_Lip, and Bot_Lip would become "Box A"
Our Top_Lipstick, Bot_Lipstick, Top_Lip_Skin, and Bot_Lip_Skin, would all be "Box B" or influenced by the movement of our lip art mesh!
We also know that the art meshes need to have similar or aligned points in order to bind them together, so let's look at the art meshes I made for each part!
Top_Lip
Top_Lipstick
You can see here that both art meshes for Top_Lip, and Top_Lipstick are the same.
This is because I want the Top_Lip to influence the entire Lipstick. So we make these the same.
Top_Lip_Skin
Top_Lip_Skin also has the same exact art mesh as Top_Lip and Top_Lipstick.
Again so we can glue the points together. The lip skin has extra points though, to fill out the rest of the art mesh area.
We can see the same things for the bottom lip parts.
Bot_Lip
Bot_Lipstick
Bot_Lip_Skin
However, for the Bot_Lip_Skin, you can see that I did not copy the part that covers the lipstick, as I really only need to glue together the points that cover the Bot_Lip.
We'll glue each part one-by-one using the same process as in Quest 1.
Repeat for:
Each one should be glued, then given full red weight influence so only the main lip mesh controls the others.
Level 3 - Stage 1 | Study File
1️⃣ Learn how glue works
2️⃣ Create effective art meshes for the mouth parts
3️⃣ Glue the mouth parts together
🚩 Quest 1: Learn how glue works
🚩 Quest 2: Create mouth art meshes
🚩 Quest 3: Glue the mouth parts together
Glue allows you to connect two different art meshes so that movement from one mesh influences the other.
Imagine two boxes — when you glue the edge points of Box A and Box B, moving Box A will also affect Box B.
Glue binds matching points between two meshes. To do this:
Your selected points will highlight, and when you exit the manual editor, you’ll see a yellow glue box between them.
Let's see this in action:
If we are to look at each boxes art mesh, you can see that I've created points along the art mesh that align.
Box A Art Mesh:
Box B Art Mesh:
It's these points across the middle line of these boxes that we can bind together.
To glue these two art meshes together, we must first select both art meshes and head into the "Manual Mesh Editing" Window.
Here we can use the pointer tool or lasso tool to select the matching points of the art meshes.
With our points selected, we can click the "Glue: Bind" button in our Tool Details window.
Once clicked, your selected points should now have a highlight around them.
This confirms that you have glued these two pieces together.
You can now exit the Manual Mesh Editing window.
Upon exiting, you will now see the points highlighted and this yellow box:
When you click the box, this window will appear:
This is your glue window / tool!
This window / tool allows you to adjust the weight of your glue.
Or in other words, which art mesh has control over what area.
The Colours indicate which art mesh has the control.
Box A (Art Mesh A) is red.
Box B (Art Mesh B) is green.
Yellow, indicates both art meshes influence.
Right now, we can see that the left side of Box A is red, the right side of Box B is green, and the middle is yellow.
This means that Box A controls the left side (Maintaining it's shape), Box B controls the right side (Maintaining it's shape), and the middle points are influenced by both art mesh positions.
If we click and drag Box A around, lets see what happens.
As we can see here, the red and green areas of each art mesh are remaining the "same", while the yellow area or the middle, is trying to stay in the middle positions of both art meshes.
We can change the weight of the glue by using our glue tools.
Let's talk about the tools from left to right.
Our first tool "Glue Weight A : B" allows you to adjust how much our first art mesh (Box A) will affect our second art mesh (Box B)
Our second tool "Glue Weight A", allows us to adjust the red art meshes influence.
Our third tool "Glue Weight B", allows us to adjust the green art meshes influence.
Our last tool "Re-Merge Glue Vertices Tool", will even out the influence of both art meshes on an area.
Let's see what the use of these tools look like:
"Glue Weight A : B"
Again, this tool will allow us to adjust how much our first mesh will affect our second mesh.
In this case, you can see I add the full red weight to Box A and Box B with this tool. It makes it so that the red area has control over all of Box A, and a portion of Box B.
Box A will have it's area remain the same while moving, while Box B is severely influenced by the movement of Box A.
"Glue Weight A" & "Glue Weight B"
This tool will allow us to only change the influence of the one art mesh, not both. So here we can see with a full weight put on Box A, it makes Box A's area remain the same or untouched, but Box B will still have a yellow/green weight, making it still influenced by Box A, but not as much.
In this example, I use "Glue Weight A" to change the weight of the red art mesh (Box A).
"Re-Merge Glue Vertices Tool"
This tool just adds back even weighting of glue!
Now let's apply what we've learned to the mouth!
First we must familiarize ourselves with the different pieces of the mouth!
Most standard VTuber Mouths will have a Mouth Line and Mouth Skin. Some cases, like this model, will have shading for lipstick or highlights!
As we saw from the glue quest, we can make an art mesh have full influence over another art mesh. (Box A had full influence to drag Box B around).
This means that we could glue everything on the top of the mouth together, and only have to rig one art mesh.
So instead of rigging all 6 parts here, we'll only have to rig two!
We need to figure out which part is our "Box A".
What part would need to move or be adjusted the most, and what parts could follow along?
Mouth Lines!
So our Top_Lip, and Bot_Lip would become "Box A"
Our Top_Lipstick, Bot_Lipstick, Top_Lip_Skin, and Bot_Lip_Skin, would all be "Box B" or influenced by the movement of our lip art mesh!
We also know that the art meshes need to have similar or aligned points in order to bind them together, so let's look at the art meshes I made for each part!
Top_Lip
Top_Lipstick
You can see here that both art meshes for Top_Lip, and Top_Lipstick are the same.
This is because I want the Top_Lip to influence the entire Lipstick. So we make these the same.
Top_Lip_Skin
Top_Lip_Skin also has the same exact art mesh as Top_Lip and Top_Lipstick.
Again so we can glue the points together. The lip skin has extra points though, to fill out the rest of the art mesh area.
We can see the same things for the bottom lip parts.
Bot_Lip
Bot_Lipstick
Bot_Lip_Skin
However, for the Bot_Lip_Skin, you can see that I did not copy the part that covers the lipstick, as I really only need to glue together the points that cover the Bot_Lip.
We'll glue each part one-by-one using the same process as in Quest 1.
Repeat for:
Each one should be glued, then given full red weight influence so only the main lip mesh controls the others.
Level 3 - Stage 1 | Study File
